2BFX3-RL19BRL19B-2.4G

Suzhou Hoopoetry Digital Technology Co., Ltd (2025-11-24) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (2BFX3-RL19B) [Suzhou Hoopoetry Digital Technology Co., Ltd (“Suzhou Hoopoetry Digital Technology Co., Ltd”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature)： (Applicant printed name)：Jian Hua

(Suzhou Hoopoetry Digital Technology Co., Ltd) (2025-11-21) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (2BFX3-RL19B) [Suzhou Hoopoetry Digital Technology Co., Ltd] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, (Applicant signature)： (Applicant printed name)：Jian Hua

Attestation Statements (November 24, 2025) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for (FCC ID:2BFX3-RL19B) (Suzhou Hoopoetry Digital Technology Co.,LTD), the undersigned, hereby authorize Lucky Cowboy Global Services, LLC to act as our designated U.S. agent for service of process, (Suzhou Hoopoetry Digital Technology Co.,LTD) accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Lucky Cowboy Global Services, XINNAISI INC accepts the responsibility to act as designated U.S. agent for service of process. Applicant Information：Suzhou Hoopoetry Digital Technology Co.,LTD Company Name:Suzhou Hoopoetry Digital Technology Co.,LTD Contact Name:Jian Hua Address:No. 99, Qinan Road, Qiangtang Village, Yangcheng Lake Town, Xiangcheng District, Suzhou FRN: 0035301431 Telephone No:0512-65428138 Email:[email protected] Signature [Jian Hua] U.S. Agent Information: Company Name: XINNAISI INC Address: 1500 N GRANT STSTER, DENVER, CO 80203 FRN: 0037518289 Contact Name: Ki Ki Telephone No: +01 (951) 893-3011 Email: [email protected] Signature [Ki Ki]

Suzhou Hoopoetry Digital Technology Co., Ltd Family models difference declaration RL19B-2.4G Model: RL19B-2.4G, RL18-2.4G，RL14-2.4G，RL13-2.4G， RL12-2.4G，RL10-2.4G,RL18，RL14，RL13，RL12，RL10 Difference declaration: The board, Schematic, Hardware version, Software version, structure and internal photos are same, named differently due to marketing purposes. Regards, Signature Jian Hua / Manager Date/City:Suzhou Phone:0512-65428138 Fax:0512-65428138 E-mail:[email protected]

Suzhou Hoopoetry Digital Technology Co.,LTD (2025-11-21) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (RL19B-2.4G / RL19B-2.4G # 2BFX3-RL19B #) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the  Schematic Diagram  Block Diagram  Operational Description Required to be submitted with this application be permanently withheld from public review. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Please contact me if there is any information you may need. Sincerely, Signature Jian Hua / Manager Date/City:Suzhou Phone:0512-65428138 Fax:0512-65428138 E-mail:[email protected]

Suzhou Hoopoetry Digital Technology Co.,LTD (2025-11-21) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen HongBiao Certification& Testing Co., Ltd Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China Leo Su [email protected]) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Jian Hua / Manager Date/City: 2025-11-21/Suzhou, Jiangsu Phone: 0512-65428138 Fax: 0512-65428138 E-mail: [email protected]

Suzhou Hoopoetry Digital Technology Co.,LTD (2025-11-21) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Short Term Confidentiality Request For(RL19B-2.4G / RL19B-2.4G # 2BFX3-RL19B #) To Whom It May Concern: In accordance with sections 0.457 and 0.459 of CFR 47, < Suzhou Hoopoetry Digital Technology Co.,LTD >. requests short-term Confidentiality of following sections of this application for a period of 45 days after grant is issued. Test setup photos External photos Internal photos User’s manual These documents contain detailed system and equipment descriptions and related information about the product, which < Suzhou Hoopoetry Digital Technology Co.,LTD > considers to be proprietary, confidential, and a custom design and otherwise, would not release to the general public. Since this design is a basis from which future technological products will evolve, < Suzhou Hoopoetry Digital Technology Co.,LTD > feels that this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give our competitors an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Jian Hua / Manager Date/City: 2025-11-21/Suzhou, Jiangsu Phone: 0512-65428138 Fax: 0512-65428138 E-mail: [email protected]

FCC ID: 2BFX3-RL19B LABEL AND LOCATION RL19B-2.4G Model: RL19B-2.4G FCC ID: 2BFX3-RL19B Label Location

FCC ID: 2BFX3-RL19B Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)]·[√f(GHZ)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where: • f(GHZ) is the RF channel transmit frequency in GHz • Power and distance are rounded to the nearest mW and mm before calculation • The result is rounded to one decimal place for comparison When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. GFSK: Antenna Type : spring antenna Antenna Gain: 1.97 dBi Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n 1g SAR Exclusion threshold SAR test exclusion GFSK 2.402 <50.618473.00YES 2.01 1.5892±1 3 1.995 Conclusion: For the max result : 0.61847≤ 3.0 for 1-g SAR, No SAR is required. Signature: Date: 2025-11-14 NAME AND TITLE (Please print or type): Leo Su /Manager COMPANY (Please print or type): Shenzhen HongBiao Certification& Testing Co., Ltd / Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China

Index: 1.ReliabilityTesting 2.Specification 3.SParameterTestData 4.AntennaRadiationPattern ================================================== 1.ReliabilityTesting TestItemProcedureRequirement 1.Visualinspection andDimension Check Applicablemethods usingx5magnification followspecification 2.RapidChanging ofTemperature -40 ̊C(30minutes)to 80 ̊C(30minutes);24 cycles After2hoursrecovery: 1.novisibledamage 2.bandwidthtolerance <±5% 3.DampHeat 24hoursat60 ̊C; 90~95%RH After2hoursrecovery: 1.novisibledamage 2.bandwidthtolerance <±5% 4.Endurance 24hoursat80 ̊CAfter2hoursrecovery: 1.novisibledamage 2.bandwidthtolerance <±5% 5.ConnectorPull StrengthTest >=1.0KgHold2~3S: 1.novisibledamage 2.bandwidthtolerance <±5% 2.Specification A.ElectricalCharacteristics S.W.R.(TestedinPC) TypicalAntennaGain Impedanc +1.5±0.5 e50Ohm B.Material MaterialofRadiatorCU ConnectorTypeN/A C.Environmental OperationTemperature-30 ̊C~+85 ̊C StorageTemperature-30 ̊C~+85 ̊C 3.S.W.R.TestingResult <= 2.0 @ 2400-2500MHZ 4. Antenna Radiation Pattern Testing Equipment Specification: Antenna Anechoic Chamber Dimension: 8 x 4 x 4 m Quite Zone: 600mm @1 GHz Isolation: >100dB @ 1 MHz ~ 10 GHz Testing Equipment: Agilent 5071B Received Antenna: 0.7 ~ 6.0 GHz for Gain Calibration Double Ridged Horn Antenna Passive Test For WIFI-2.4G Freq Effi Effi Gain Gain UHIS DHIS Max Min irectivitBeamwidth AttH AttV (MHz) (%) (dB) (dBi) (dBd) (%) (%) (dB) (dB) (dBi) (3dB) (dB) (dB) 2400 58.14 -2.36 1.97 -0.18 21.985 36.153 1.97 -14.07 4.33 30 45.1 45.07 2410 51.05 -2.92 1.43 -0.72 18.952 32.094 1.43 -14.62 4.35 30 44.88 44.83 2420 49.53 -3.05 1.46 -0.69 17.903 31.632 1.46 -15.64 4.51 30 44.83 44.71 2430 46.19 -3.35 1.11 -1.04 16.291 29.894 1.11 -17.75 4.47 30 45.16 44.88 2440 43.85 -3.58 1.02 -1.13 14.97 28.879 1.02 -20.12 4.6 30 45.17 44.95 2450 44.52 -3.51 1.05 -1.1 14.746 29.773 1.05 -19.21 4.56 30 45.89 45.33 2460 46.39 -3.34 1.32 -0.83 14.837 31.55 1.32 -18.38 4.65 30 45.86 45.53 2470 40.85 -3.89 0.71 -1.44 12.534 28.316 0.71 -21.74 4.6 30 45.69 45.39 2480 39.39 -4.05 0.75 -1.4 11.59 27.8 0.75 -21.58 4.8 30 45.73 45.51 2490 39.32 -4.05 0.57 -1.58 11.059 28.259 0.57 -19.63 4.62 30 45.96 45.84 2500 35.58 -4.49 0.58 -1.57 9.659 25.916 0.58 -19.94 5.07 30 45.47 45.3

- Page 1 of 40 - Report No.: HB20251111058E1 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Test Report Product: RL19B-2.4G Trade Mark: HOOPOETRY Model Number: RL19B-2.4G Series Models: RL19B-2.4G, RL18-2.4G，RL14-2.4G， RL13-2.4G， RL12-2.4G，RL10-2.4G,RL18，RL14， RL13，RL12，RL10 FCC ID: 2BFX3-RL19B Prepared for Suzhou Hoopoetry Digital Technology Co., Ltd No. 99, Qinan Road, Qiangtang Village, Yangcheng Lake Town, Xiangcheng District, Suzhou Prepared by Shenzhen HongBiao Certification& Testing Co., Ltd Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China Tel.: +86-755-2998 9321 Fax.: +86-755-2998 5110 Website: http://www.sz-hongbiao.com - Page 2 of 40 - Report No.: HB20251111058E1 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Table of Contents 1 GENERAL DESCRIPTION ..................................................................................................................................... 6 1.1 D ESCRIPTION OF EUT ................................................................................................................................................ 6 1.2 T EST M ODE .............................................................................................................................................................. 6 1.3 O PERATION C HANNEL LIST ........................................................................................................................................... 7 1.4 T EST S ETUP .............................................................................................................................................................. 7 1.5 P OWER SETTING CONFIGURATION PARAMETERS ............................................................................................................... 7 1.6 A NCILLARY E QUIPMENT .............................................................................................................................................. 7 2 SUMMARY OF TEST RESULT ............................................................................................................................... 8 3 TEST FACILITIES AND ACCREDITATIONS .............................................................................................................. 9 3.1 T EST L ABORATORY ..................................................................................................................................................... 9 3.2 E NVIRONMENTAL C ONDITIONS ..................................................................................................................................... 9 3.3 M EASUREMENT U NCERTAINTY ..................................................................................................................................... 9 3.4 T EST S OFTWARE ...................................................................................................................................................... 10 4 LIST OF TEST EQUIPMENT .................................................................................................................................11 5 TEST ITEM AND RESULTS ...................................................................................................................................13 5.1 A NTENNA R EQUIREMENT .......................................................................................................................................... 13 5.1.1 Standard Requirement ............................................................................................................................. 13 5.1.2 Test Result ................................................................................................................................................. 13 5.2 C ONDUCTED E MISSION ............................................................................................................................................. 14 5.2.1 Limits ........................................................................................................................................................ 14 5.2.2 Test Procedures ......................................................................................................................................... 14 5.2.3 Test Setup .................................................................................................................................................. 15 5.2.4 Test Result ................................................................................................................................................. 15 5.3 R ADIATED E MISSION ................................................................................................................................................ 17 5.3.1 Limits ........................................................................................................................................................ 17 5.3.2 Test Procedures ......................................................................................................................................... 17 5.3.3 Test Setup .................................................................................................................................................. 17 5.3.4 Test Result ................................................................................................................................................. 18 5.3.5 Band Edge - Radiated ............................................................................................................................... 22 5.3.…

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